MCP2021-330E-P MICROCHIP [Microchip Technology], MCP2021-330E-P Datasheet - Page 16

• Manufacturer Part Number: MCP2021-330E-P
• Description: LIN Transceiver with Voltage Regulator
• Manufacturer: MICROCHIP [Microchip Technology]

MCP2021/2/1P/2P
1.6
1.6.1
The MCP2021 has a low-drop-out voltage, positive reg-
ulator capable of supplying 5.00 V
50 mA of load current over the entire operating temper-
ature range of -40°C to +125°C. With a load current of
50 mA, the minimum input to output voltage differential
required for the output to remain in regulation is typi-
cally +0.5V (+1V maximum over the full operating tem-
perature range). Quiescent current is less than 100 µA
with a full 50 mA load current when the input to output
voltage differential is greater than +3.00V.
The regulator requires an external output bypass
capacitor for stability. See
capacity and ESR for stable operation.
Designed for automotive applications, the regulator will
protect itself from double-battery jumps and up to +43V
load dump transients. The voltage regulator has both
short-circuit and thermal-shut-down protection built in.
Regarding the correlation between V
please refer to
the input voltage (V
needed to provide stable regulation, the output V
will track the input down to approximately 3.5V, at
which point the regulator will turn off. This will allow
microcontrollers with internal POR circuits to generate
a clean arming of the POR trip point. The MCP2021 will
then monitor V
rises above 5.75, again.
FIGURE 1-9:
DS22018F-page 16
Internal Voltage Regulator
V
REG
5.0V REGULATOR
BB
Figure 1-10 throughFigure
and turn on the regulator when V
BB
Voltage Regulator Block Diagram.
) drops below the differential
Figure 2-3
Sampling
Network
V
DC
BB
REF
, V
±3% at up to
REG
1-12. When
for correct
and I
REG
DD
BB
,
Transient
Element
Pass
Fast
Loop
When the input voltage (V
tial needed to provide stable regulation, the output
V
+4.25V. The regulator will turn off the output at this
point. This will allow PIC
POR circuits to generate a clean arming of the POR trip
point. The regulator output will stay off until V
above +5.75 V
In the start phase, the device must detect at least 5.75V
to initiate operation during power up. In the Power-
Down mode, the V
The regulator has a thermal shutdown. If the thermal
protection circuit detects an overtemperature condition,
and the signals T
the regulator will shut down. The recovery from the
thermal shutdown is equal to adequate cooling time.
REG
Note:
Buffer
) will track the input down to approximately
The regulator has an overload current
limiting of approximately 100 mA. During a
short circuit, the V
V
off. After a recovery time of about three
milliseconds, the V
again. If there is no short circuit (V
>3.5V), the V
REG
DC
XD
.
is lower than 3.5V, the V
BB
© 2005-2012 Microchip Technology Inc.
and RXD are LOW, or T
monitor will be turned off.
®
REG
BB
microcontrollers with internal
) drops below the differen-
will be switched back on.
REG
REG
will be checked
is monitored. If
V
V
SS
BB
REG
XD
is HIGH,
will turn
BB
REG
is